Electric stove



Aug. 16, 1938. A. o. SAMUELS ,4

' ELECTRIC STOVE Filed Feb. 19, 1935 INVENTOR A950 54/70546 ATTORNEYPatented Aug. 16, 1938 2,127,425

UNITED STATES PATENT OFFICE ELECTRIC STOVE- Abe O. Samuels, Rochester,N. Y., assignor to Samson-United Corporation, Rochester, N. Y.

Application February 19, 1935, Serial No. 7,238

10 Claims. (01. 219-37) This invention relates to electric stoves andhas central supporting member and suitable supfor its object to providesuch a stove with a porting ribs 5A, 5A which extend radially fromlouvered grid which permits direct heat radiation the central supportingmember within the confrom the heating unit but prevents metal objectscentric supporting ridge 4. The ribs 5A or other 5 generally used aroundthe stove from coming into suitable structure of platform 3 provide forex- 5 contact with any portion of the heating coil of pansion andcontraction of platform 3. the heating unit. The supporting members thusprovided by the A further object of this invention is to increase grid,together with the platform 3, are struck the strength of the stoveframeby forming the up from the underside of the top of the casing gridintegral therewith. and form an integral part thereof. The se% 10Another object of this invention is to provide mental sections of theplatform 3 between the a novel form of suspension for the heating unitelevated supporting members of the grid have of the stove. the angularlyprojecting louvers 6, 6 struck up All these and other objects of thisinvention will therefrom. In the form illustrated in Figure 1,

become more readily apparent from the detailed these louvers areconcentric to the grid and in- 15 description thereof which follows,reference becline upwardly toward the center thereof and ing had to theaccompanying drawing in which are so arranged that their outlet openingsbe Figure 1 is a top plan view of the electric stove. tween the upperedge of one louver and the lower Figure 2 is a vertical sectional viewof the stove, edge of the succeeding louver are restricted and thesection being taken on the line 2-2 of Figare located in a substantiallyvertical plane so 20 ure 1. that no object used around the stove can becon- In the figures like reference numerals indicate veniently insertedor dropped therethru. Thus like parts. as shown particularly in Fig. 2,the louvers may In electric stoves in which the heating coil of beformed as oblique bar members positioned so 5 the heating unit islocated in suitable grooves that the upper edge of one bar issubstantially in provided in a base of refractory material and theregister with the lower edge of an adjacent bar. heating coil is thusexposed so that any metallic The heating unit I is made up of a suitablereimplement can be brought in contact therewith fractory material and isprovided with open and accidentally provide a short circuit betweengrooves 8 into which is nested the heating coil 9.

3 it and the stove frame, the requirement of the The heating unit isfastened to the underside of Board of Underwriters makes it necessary toprothe grid and its louvers by means of a pair of vide such a stove witha two-pole switch so that p g screws l0 and I l and the cover I2. Thisthe heating unit is completely out out of the elecver i h nn l sh p d ndextends across the trio circuit whenever the switch is opened. In bottomof the heating unit with its outwardly my present invention thisrequirement has been flaring flanges 3 a d resting against the bot- 35eliminated by the use of a grid provided with tom of the heating unit.The clamping screws louvers which cover the heating unit and prevent poject t u e d, the edges of t e he the insertion of any implement usedaround the unit and thru the flanges I3 and M of the cover stove to makecontact with the heating coil, to have the clamping nuts I5 which arethreaded 40 These louvers are arranged so that they do not onto thebolts, simultaneously clamp the cover i2 40 obstruct the radiation ofheat from the heating in t bottom of the h n ni and th unit and thuswill not affect the efficiency of the eating unit against the bott of te d and stove. The use of a single pole switch is theres ouv rs. forenow permissible with this type of heating The COVeI thus forms a Shieldst t e unit and makes it possible to simplify the condirect radiation ofheat from the bottom of the 45 struction of the stove and reduce thecost of manheating unit and p v a a r Chamber which ufacture thereof.extends along the bottom of the heating unit As illustrated in thefigures of the drawing, the from which the heat radiated from the bottomof electric stove comprises a metal casing I which is the heating unit,Can escape thrll the p s supported on suitable legs 2, 2. The casing is16, IS in the sides of the cover. The heat from 50 open at the bottomand closed on all sides and the bottom of the heating unit is thuslaterally the top and in the closed top is struck up a grid distributedin the casing so that part of it can which, in the present instance,comprises a slightescape thru the openings I! provided in the top lyelevated circular platform 3 bordered by a conof the casing on theoutside of the grid. In this centric supporting ridge 4 and providedwith a way excess heat from the heating unit is dissi- 55 pated and isnot radiated against the table top or other supporting surface on whichthe stove is supported.

From an inspection of Figure 2 of the drawing, it will be apparent thatthe louvers 6, 6 overhang the groove 8 and the heating coil 9 locatedtherein so that this heating coil is fully protected and no metal objector implement dropped onto the grid of the stove can enter the groove andcause a short circuit between the heating coil and the casing of thestove. The switch I8, located at one end of the air chamber, provided bythe cover l2, can therefore be a single pole switch for the control ofthe electric current as the danger of causing a short circuit betweenthe heating coil and the stove casing has been eliminated by the use ofthe covered grid over the heating unit, as pointed out above.

I claim:

1. In an electric stove the combination of a metal top, a grid formedintegral in said top, louvers struck up from said grid, a heating unit,a cover for the bottom of. said heating unit and clamping means forclamping said cover against said heating unit and said heating unitagainst the under side of said grid.

2. In an electric stove the combination of a stove top, a grid providedin said stove top, louvers in said grid to provide lateral openingstherein, a heating unit fastened to the under side of said stove top, asubstantially U shaped cover on the under side of said heating unithaving openings in the side thereof and providing a shield for thebottom of said heating unit with an air chamber between it and saidshield.

3. In an electric stove the combination of a grid having a substantiallycircular supporting ridge, radially arranged supporting ridges withinsaid circular ridge dividing said grid into segmental sections,angularly disposed and concentrically arranged louvers struck up in saidsegmental sections of said grid and inclined toward the center of saidgrid.

4. In an electric stove the combination of a casing closed on all sidesand the top and open at the bottom, an electric heating unit comprisinga plate member of refractory material with a heating coil embeddedtherein, a hollow cover, and clamping means for clamping said hollowcover against the bottom of said plate member and said plate memberagainst the under side of the top of said casing.

5. In an electric stove as set forth in claim 4 in which the top of. thecasing is provided with louvered openings above the heating unit.

6. In an electric stove the combination of a sheet metal top, a sheetmetal casing surrounding said sheet metal top, a heating unit mountedwithin said casing below said sheet metal top, circularly arrangedlouvers inclined toward a common center provided in said sheet metal topand expansion means provided in said sheet metal top and dividing saidlouvers into segments so as to provide lateral expansion between thelouvered sections of the sheet metal top.

'7. In an electric stove the combination of a. sheet metal casing, asheet metal top for said casing, a grid raised on said sheet metal top,concentrically arranged louvers inclined toward a common center providedin said grid, a heating unit clamped to the under side of said grid anda cover clamped to the bottom of said heating unit within said casing toprovide an insulating chamber between said heating unit and the tabletop on which the electric stove is supported.

8. In an electric stove, a grid having a substantially circularsupporting ridge and being provided with substantially radially arrangeda means dividing said grid into sectors and adapted to permit expansionand contraction of said grid, an electric heating unit supported on theunder side of said grid and adapted to rediate heat upon said grid, anda plurality of relatively long arcuate louvers provided in said sectorsof. said grid and inclined toward the center of said grid.

9. In an electric stove, a metal top, a grid provided in said metal topand having a substantially circular supporting ridge and being providedwith substantially radially arranged means dividing said grid intosectors and adapted to permit expansion and contraction of said grid, anelectric heating unit supported on the under side of said grid andadapted to radiate heat upon said grid, said grid being provided in saidsectors with a pluralityof substantially parallel bar members positionedobliquely of said grid and with the upper edge of one bar substantiallyin register with the lower edge of an adjacent bar.

10. In an electric stove, a plate comprising a grid area bounded by aridge of substantially circular contour, said grid area being providedwith substantially radially disposed supporting ridges dividing saidgrid area into sectors, a plurality of arcuate louvers formed in saidsectors and being substantially parallel with said circular boundaryridge, and an electrical heating unit supported on the under side ofsaid grid area and adapted to radiate heat upon said grid area.

ABE O. SAMUELS.

